feat: add accuracy support for android

.gitignore

@@ -39,6 +39,8 @@ project.xcworkspace
 .settings
 local.properties
 android.iml
+android/gradlew
+android/gradlew.bat
 
 # Cocoapods
 #

android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.2-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

android/src/main/java/com/compassheading/CompassHeadingModule.java

@@ -32,6 +32,14 @@ public class CompassHeadingModule extends ReactContextBaseJavaModule implements
   private int mFilter = 1;
 
   private SensorManager sensorManager;
+  /**
+   * Possible values.
+   * 0 -> sensorManager.SENSOR_STATUS_UNRELIABLE
+   * 1 -> sensorManager.SENSOR_STATUS_ACCURACY_LOW
+   * 2 -> sensorManager.SENSOR_STATUS_ACCURACY_MEDIUM
+   * 3 -> sensorManager.SENSOR_STATUS_ACCURACY_HIGH
+   */
+  private int mAccuracy = SensorManager.SENSOR_STATUS_ACCURACY_MEDIUM;
 
   private final float[] mGravity = new float[3];
   private final float[] mGeomagnetic = new float[3];
@@ -174,7 +182,7 @@ else if(rotation == Surface.ROTATION_180){
 
           WritableMap params = Arguments.createMap();
           params.putDouble("heading", mAzimuth);
-          params.putDouble("accuracy", 1.0);
+          params.putDouble("accuracy", mAccuracy);
 
           getReactApplicationContext()
             .getJSModule(DeviceEventManagerModule.RCTDeviceEventEmitter.class)
@@ -185,5 +193,17 @@ else if(rotation == Surface.ROTATION_180){
   }
 
   @Override
-  public void onAccuracyChanged(Sensor sensor, int accuracy) {}
+  public void onAccuracyChanged(Sensor sensor, int accuracy) {
+
+    if (sensor.getType() == Sensor.TYPE_MAGNETIC_FIELD) {
+      mAccuracy = accuracy;
+      WritableMap params = Arguments.createMap();
+      params.putDouble("heading", mAzimuth);
+      params.putDouble("accuracy", mAccuracy);
+
+      getReactApplicationContext()
+        .getJSModule(DeviceEventManagerModule.RCTDeviceEventEmitter.class)
+        .emit("HeadingUpdated", params);
+    }
+  }
 }

src/index.tsx

@@ -23,6 +23,18 @@ let _start = CompassHeading.start;
 
 type dataType = {
   heading: number;
+  /**
+   * for Android:
+   * 0 -> sensorManager.SENSOR_STATUS_UNRELIABLE
+   * 1 -> sensorManager.SENSOR_STATUS_ACCURACY_LOW
+   * 2 -> sensorManager.SENSOR_STATUS_ACCURACY_MEDIUM
+   * 3 -> sensorManager.SENSOR_STATUS_ACCURACY_HIGH
+   * https://developer.android.com/reference/android/hardware/SensorManager
+   *
+   * for iOS:
+   * in degree of the offset
+   * https://developer.apple.com/documentation/corelocation/clheading
+   */
   accuracy: number;
 };